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<p>The QWSScreenSaver class is a base class for screensavers in Qtopia Core. <a href="#details">More...</a></p>
<pre> #include &lt;QWSScreenSaver&gt;</pre><ul>
<li><a href="qwsscreensaver-members.html">List of all members, including inherited members</a></li>
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<a name="public-functions"></a>
<h3>Public Functions</h3>
<ul>
<li><div class="fn"/>virtual <b><a href="qwsscreensaver.html#dtor.QWSScreenSaver">~QWSScreenSaver</a></b> ()</li>
<li><div class="fn"/>virtual void <b><a href="qwsscreensaver.html#restore">restore</a></b> () = 0</li>
<li><div class="fn"/>virtual bool <b><a href="qwsscreensaver.html#save">save</a></b> ( int <i>level</i> ) = 0</li>
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<h2>Detailed Description</h2>
<p>The QWSScreenSaver class is a base class for screensavers in Qtopia Core.</p>
<p>When running <a href="qtopiacore.html">Qtopia Core</a> applications, it is the server application that installs and controls the screensaver. <a href="qtopiacore.html">Qtopia Core</a> supports multilevel screen saving, i.e&#x2e;, it is possible to specify several different levels of screen responsiveness. For example, you can choose to first turn off the light before you fully activate the screensaver.</p>
<p>Note that there exists no default screensaver implementation.</p>
<p>To create a custom screensaver, derive from this class and reimplement the <a href="qwsscreensaver.html#restore">restore</a>() and <a href="qwsscreensaver.html#save">save</a>() functions. These functions are called whenever the screensaver is activated or deactivated, respectively. Once an instance of your custom screensaver is created, you can use the <a href="qwsserver.html#setScreenSaver">QWSServer::setScreenSaver</a>() function to install it.</p>
<p>See also <a href="qwsserver.html">QWSServer</a>, <a href="qscreen.html">QScreen</a>, and <a href="qtopiacore.html">Qtopia Core</a>.</p>
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<h2>Member Function Documentation</h2>
<h3 class="fn"><a name="dtor.QWSScreenSaver"></a>QWSScreenSaver::~QWSScreenSaver ()&nbsp;&nbsp;<tt> [virtual]</tt></h3>
<p>Reimplement this function to destroy the screensaver.</p>
<h3 class="fn"><a name="restore"></a>void QWSScreenSaver::restore ()&nbsp;&nbsp;<tt> [pure virtual]</tt></h3>
<p>Implement this function to deactivate the screensaver, restoring the previously saved screen.</p>
<p>See also <a href="qwsscreensaver.html#save">save</a>() and <a href="qwsserver.html#screenSaverActivate">QWSServer::screenSaverActivate</a>().</p>
<h3 class="fn"><a name="save"></a>bool QWSScreenSaver::save ( int <i>level</i> )&nbsp;&nbsp;<tt> [pure virtual]</tt></h3>
<p>Implement this function to activate the screensaver, saving the current screen.</p>
<p><a href="qtopiacore.html">Qtopia Core</a> supports multilevel screen saving, i.e&#x2e;, it is possible to specify several different levels of screen responsiveness. For example, you can choose to first turn off the light before you fully activate the screensaver. Use the <a href="qwsserver.html#setScreenSaverIntervals">QWSServer::setScreenSaverIntervals</a>() to specify the time intervals between the different levels.</p>
<p>This function should return true if the screensaver successfully enters the given <i>level</i>; otherwise it should return false.</p>
<p>See also <a href="qwsscreensaver.html#restore">restore</a>() and <a href="qwsserver.html#screenSaverActivate">QWSServer::screenSaverActivate</a>().</p>
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